Gas burner



Jan. 6, 1959 H. E. MORRISON GAS BURNER Filed May 19, 1954 1 EVE .2: farHzzom. 4. Mom/so "in i V {9 i l.

2 -Claims. (Cl. 158-113) This invention relates to improvements in gasburners and more'p'articularly relates to a simplified form of gasburner adapted for use in gas heated clothes dryers and the'like,although not limited to such uses.

A principal object of my invention is to provide a simple and improvedform of gas burner so constructed and arranged as to increase theefliciency of combustion and to reduce the likelihood of the flame goingout upon sudden surges in pressure.

Still another object of my invention is to provide a simple and lightergas burner, formed from an open ended tube having an inlet at one end ofthe tube and 'an outlet at the oppsite end of the tube in the form of auniformly curving inwardly extending wall portion forming a dischargeorifice for the tube, and having flame-deflecting means extending overthe discharge orifice, and forming a flame pocket to reignite the burnerin case the flame should be blown out by sudden surges inpressurecooperating with the burner orifice "to effect complete mixture of thegas with 'air withthe resultant complete combustion thereof.

These and other objects of my invention will appear from time to time asthe following specification proceeds andwith reference to accompanyingdrawings wherein:

Figure 1 is a plan view of a gas burner constructed in accordance withmy invention and shown as being connected in a gas supply system, suchas iscommonly used in gas heated clothes dryers.

Figure 2 is an enlarged plan view of the gas burner shown in Figure 1;

Figure 3 is a view in side elevation of the gas burner;

Figure 4 is an enlarged fragmentary sectional view of the gas burnertaken substantially along lines IV-IV of Figure 2;

Figure 5 is a fragmentary view showing a modified form in which myinvention 'may be embodied; and

Figure 6 is a view of the venturi and air'valveiused in the form of myinvention illustrated in Figure 5.

In Figure 1 of the drawings, 1 have shown a'gas burner 10 connected to agas supply line 11 by a coupling 12. The gas supply line is shown ashaving a pressure regulator valve 13 therein, to assurea'uniformpressure of gas regardless of variations in pressure of'the'gas at the source. A main gas supply valve '14 and a main burner valveare also shown as being connected in the gas supply line 11. The gassupply valve 14 and main burner valve 15 may be solenoid operated, andare of a conventional form so need not herein be shown or describedfurther.

A pilot burner 16 is shown as being connected to a bracket or mounting17, projecting outwardly from a collar 18. The collar 18 encircles acylindrical body portion 19 of the burner 10 and may be welded orotherwise secured thereto. The bracket 17 also has a depend ing bracketportion 2i forming a mounting for the burner. The pilot burner 16 is ofa well known form and is connected with the gassupply-line 11 throughthe gas supply valve 3.4 and may be supplied with gas whenever hereinshown or described further.

be blown out by sudden surges in pressure.

2,367,272 Patented Jan. 6, 1959 the gas supply valve '14 is open and thecontrol system for the valves 14 and 15 is electrically energized. Apilot line 21 is shown as forming a source of supply of gas to the pilotburner 16. Adjacent thepilot burner .is an igniter ZZwhichmay beelectrically energized under the control :of the electrical controlsystem and preferably is in the form'of a glow coil of a well-knownform, so not A control means is also provided for the gas supply valve'14 which may be in theformiof 'airnercury' bulb or any other suitablethermostatic element (not shown) for efiecting' the 'de-energization ofthe solenoid for the valve 14, in case the pilot should fail to ignite.Said control means is no part of my present invention, so need notherein be described further.

The gasburner 10 is shown as being in the form of a tube open at itsopposite ends .and having a generally cylindrical wall 23 at the inletend thereof, relatively short compared to Tthe wall 19. The wall 23 hasa plurality of ports "24 leading :therethrough andv affording a sourceof air for'mixture with the gas entering the'inlet end of the valve. I

Surrounding the cylindrical wall 23 for a portion of the peripherythereof,'and1mounted thereon for slidable movement thereabout is an airvalve 25. The air valve 25, as herein shown, has spaced wall portions 27:and -29 movablealong the wall 23 tozrestrict the size of the ports 24and control thevo-lume of .air admitted therethrough, as is usualwith-such burners. The wall portion 27 is shown as being slotted toreceive a screw 39 which may be threadedin the wall 23 of the gas burner10, to :hold the valve 25 in 'position. The valve '25 also :extendsacross the end of the gas burner and forms a fitting through which the.gas supply coupling .12 may extend for supplying'gas tothe inlet'end ofthe burner '10.

Inwardly of the cylindrical 'wall portion 23 of 'the burner 10, is aninwardly curved wall portion 31 curving inwardly to a restricted throat32 and thence t gradually flaring outwardly to thecylindrical wallportion .19 of the gas burner, and forming inefiect, a venturi.

The wall-portion 19 ofthe gas'burn'erlhas an inwardly contoured end 35,uniformly curving to :form a discharge o-r*burner orifice 36. Thecontour of 'thewall l9 at'the discharge end of the burne'r is such as todeflect the gas and airsinwardlyto create'ed'dy currents in themixtureof gas and airspassing through theorifice-andeffect a morecomplete mixture of the gas'and air. The inwardly curved burner orifice36 also cooperates with a hollow hemispherical flame pocket anddeflector '37. Said flame pocket and deflectortextends over andforwardly of the burner orifice 36 and extends downwardly to a levelsubstantially midway of each side of the tube'and thereby surroundsaboutone half the circumference of the burner orifice and forms a shieldedflame pocket over the orifice, maintaining a flame to reignite the gasin cases where the flame may The flame pocket and deflector 37"als0arrests forward travel of the gas and air and deflects the gas and airdownwardly, uniformly spreading theflame-and'thus'affectingathoroughrnixing of the gas with the air 'asit'leaves'the dis charge orifice 36,-and increases theefliciencyofcombustion.

As herein shown, the hemispherical flame pocket and positioned atsubstantially the center of the gas flame which may be seamless tubing,and maybe spun to form the venturi adjacent the inlet end of the burnerand form the wall defining the burner orifice to the desired form. Itis, of course, obvious,v that the tube need not be spun, but may berolled or formed inany other manner desired, and may even be formed froma metallic sheet suitably formed to the desired form. It should furtherbe understood that the metal used for the burner need notbe steel butmay be of various other suitable metals.

The collar 18, bracket 17 and flame deflector 37 may also be made fromsheet metal, such as steel or any other suitable metal. The entireburner may then beenameled if desired to increase the resistance of themetal to the corrosive action of the gases.

In the embodiment of my invention illustrated in Figures and 6 ofthedrawings, I have shown a burner like that shown on Figures 1 through 4,but have shown the body of the burner in the form of a straight tube 40,with a venturi insert and air valve 41 in the inlet end thereof.

In this form of my invention the cross-sectional area of the throat ofthe venturi may be varied for various types of gases to be burned, bychanging the venturi inserts as required.

The tube 40 is shown as having the venturi insert 41 inserted in itsinlet end for axial adjustment with respect thereto to vary the mixtureof the air and gas to be used. As herein shown, the tube 40 has twodiametrically opposed ports 42 leading therethrough for supplying airthrough port 43 in a wall 44 of the insert 41. The tube 40 also has aslot 45 extending circumferentially along its wall for a portion of theperiphery thereof, through which extends a machine screw 46 for 4interior of said flame deflector to protect the flame and further assurecomplete mixing of the gas and air and increase the efliciency ofcombustion thereof.

It may alsobe seen that the gas burner of my invention may be made froma simple tube having interchangeable venturi inserts at the inlet endthereof, and thus enabling the burner to readily be accommodated tovarious types of gas.

It may also be seen that the gas burner of my invention is of a farsimpler construction than the gas burners theretofo-re used and avoidsthe use of the more or less heavy, difficult to cast, cast-iron partsheretofore used, and instead forms the burner from a simple formed metaltubing, all of the parts of which may be formed from sheet steel and maybe secured together by inexpensive welding operations.

It will be understood that modifications and variations may be effectedwithout departing from the scope of the novel concepts of the presentinvention.

I claim as my invention:

1. A gas burner comprising a horizontally extending metal tube having aninlet at one end thereof, a cylindrical wall portion at the inlet endthereof converging to a reduced diameter throat of a venturi anddiverging from said throat to a generally cylindrical wall portioncontoured adjacent the outer end thereof in the form of a uniforminwardly turned wall terminating in a burner orifice, and a downwardlyopening hollow hemispherical flame deflector mounted on said'tuberearwardly of said burner orifice and extending over said burner orificeand downwardly to a level substantially midway of each side of the tubeand thereby surrounding aboutone half the circumference of the burnerorifice, and cooperating therewith to effect a shielded flame pocket andto arrest holding the venturi insert 41 in position, when the air ports42 and 43 are in proper adjustment with respect to each other.

The insert 41 has a flanged outer end portion 47, abutting the end wallof the tube 40, which has an annular fitting member 48 welded orotherwise secured to the outer face thereof. The fitting member 48 isshown as having a central passageway 49, extending within the flange 47and forming a means for connecting the fitting 12 thereto.

The insert 41 also has a converging wall portion 50, converging to adischarge orifice 51 formingthe throat of a venturi, inwardly of theinlet of the tube 40.

.The outlet from the tube 40, like the tubular wall 19 of the burner 10,has a uniformly curved converging outlet 53 cooperating with adownwardly opening hemispherical flame pocket and deflector 54 to reduceblowing out of the flame by sudden surges in pressure and to assure acomplete mixture and combustion of the air and gas, .with a minimumamount of carbon monoxide in the products of combustion.

It .may be seen from the foregoing that 1 have provided an extremelysimple and eflicient form of gas burner made from metal tubing and spunor otherwise formed to the desired shape, and having an inwardly turneddischarge end forming a discharge orifice for the burner and socontoured as to efliciently mix the gas with the air mixing with the gasthrough the valve 24 and thus increasing the efliciency of combustion ofthe gas.

It maystill further be seen that the inwardly turned discharge end ofthe burner .is partially enclosed by the flame deflector. 37 andcooperates with the hemispherical forward travel of the flame anddeflect'and uniformly spread the flame. 1

2. A gasburner comprising a horizontally extending sheet metal tubehaving an inlet through one end thereof and a discharg'e'outlet throughthe opposite end thereof and having an apertured-wall portion adjacentsaid inlet for the admission of air thereto, and also having venturimeans in association with said inlet on the downstream side of saidapertured wall portion, said tube also hav- 3 ing a valve memberrotatably mounted around said apertured wall portion adjacent said inletfor association with the aperturesleading through said wall portion, tovary the inlet area thereof and the quantity of air supplied for mixturewith the gas, and having an inwardly contoured discharge end uniformlycurving to form a burner orifice and beyond the end thereof anddownwardly therealong to a level substantially midway of each sideorifice and directing the gases toward the center of said burner, tocreate eddy currents therein and eflect a thorough mixture of the gaswith air, and a downwardly opening hollow hemispherical flame pocket anddeflector secured to said tube rearwardly of the inwardly contoureddischarge end thereof and extending above said burner of the tube andthereby surrounding about one half the circumference of the burnerorifice and cooperating with said tube and orifice to form a flamepocket shielded from sudden increases in pressure of the gas and air andto arrest the forward travel of the gas and uniformly deflect the gas ina. downward direction.

References Cited in the file of this patent UNITED STATES PATENTS1,158,652 Doyle Nov. 2, 1915 1,192,550 Needham July 25, 1916 1,320,108Werlin Oct. 28, 1919 1,364,094 Fisher Jan. 4, 1921 1,707,451 Thomas Apr.2, 1929 2,149,182 Powers Feb. 28, 1939 2,485,058 McKee Oct. 18, 19492,731,009 Pocrass et al. Jan. 17, 1956

